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[英]android location - cannot get location in service when app is background
[英]How To Get User Location when App is Background with Service?
您好,我正在开发一个在后台获取用户位置并将其发送到Firebase数据库的应用程序。 当应用程序位于前台时,一切正常,但是当我将应用程序移至后台位置时,它没有刷新,它尝试获取位置,但始终提供相同的位置。 这是我的代码:
private void fn_getlocation() {
locationManager = (LocationManager) getApplicationContext().getSystemService(LOCATION_SERVICE);
isGPSEnable = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
isNetworkEnable = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
if (!isGPSEnable && !isNetworkEnable) {
} else {
if (isNetworkEnable) {
location = null;
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
return;
}
else
{
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 1000, 0, this);
if (locationManager!=null){
location = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
if (location!=null){
Log.e("latitude",location.getLatitude()+"");
Log.e("longitude",location.getLongitude()+"");
latitude = location.getLatitude();
longitude = location.getLongitude();
fn_update(location);
}
}
}
}else if (isGPSEnable){
location = null;
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,1000,0,this);
if (locationManager!=null){
location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (location!=null){
Log.e("latitude",location.getLatitude()+"");
Log.e("longitude",location.getLongitude()+"");
latitude = location.getLatitude();
longitude = location.getLongitude();
fn_update(location);
}
}
}
}
}
好的,我找到了解决方案。 Android Oreo中有一个用于优化电池的选项。 此选项试图停止应用程序的后台任务。 因此,您需要转到应用信息>电池>电池优化>取消选中您的应用
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